linux-kernel - Re: [PATCH v3 2/2] riscv: Fix text patching when IPI are used

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Message-ID: <20240304-makeshift-bakeshop-26c9611de1a3@spud>
Date: Mon, 4 Mar 2024 19:27:04 +0000
From: Conor Dooley <conor@...nel.org>
To: Alexandre Ghiti <alexghiti@...osinc.com>
Cc: Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Andrea Parri <andrea@...osinc.com>,
	Samuel Holland <samuel.holland@...ive.com>,
	Anup Patel <anup@...infault.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	Björn Töpel <bjorn@...osinc.com>,
	Andrea Parri <parri.andrea@...il.com>
Subject: Re: [PATCH v3 2/2] riscv: Fix text patching when IPI are used

On Thu, Feb 29, 2024 at 01:10:56PM +0100, Alexandre Ghiti wrote:
> For now, we use stop_machine() to patch the text and when we use IPIs for
> remote icache flushes (which is emitted in patch_text_nosync()), the system
> hangs.
> 
> So instead, make sure every CPU executes the stop_machine() patching
> function and emit a local icache flush there.
> 
> Co-developed-by: Björn Töpel <bjorn@...osinc.com>
> Signed-off-by: Björn Töpel <bjorn@...osinc.com>
> Signed-off-by: Alexandre Ghiti <alexghiti@...osinc.com>
> Reviewed-by: Andrea Parri <parri.andrea@...il.com>

What commit does this fix?


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